Boring machine



Apr. lo, 1923. 1,451,585

, A. W. MARQUIS BORING vMACHINE 'Filed Peb. w, 3920 2 Smets-sheet l A. W. MARQUIS BORING MACHINE Filed Feb. V, 1920 2 Sheets-sheet 2 To all ivwmz'tmaycamera: y

Ams'ren W. Mamme,

Hollisten in the county of San State lof. California, have -invented certain pigment. T

- in the laccompanyin complete apparatus;

zelevation of agagin length, adapted to s ide freely in an o'penin transverse of theboring bar. i designate- Panarea Apr. 10,1923'.

y. insists' V ALIs'rEn w. MARQUIS, ornonnrs'rnmcnrronme. '5

noemer.' maenner-1. v

Application tiled February 1 Be it known-that I, citizen of the Uni-ted States, residing 'at Benito and new and useful Improvements in Boring Machines; andl I do herebydeclare the f ollowing to be a full,",clear, and exact descrip- 'tion of theinventioni'such. as will enable.

others skilled 'in-the' art to "which it apertainsy to make and use the same a yinaaingvabbia'meai bushings orV bean ings of ayjconnecting rod to the :crank pin it has been customary to first rubpigment on the' crank pin, then to clamp the bearing on the crank *pin (with the bushings in place) tightenit land .turn the shaft over;

then to remove -theconnecti'ng'rod from the crank pinl and' scrape the babbitt bushings to remove the high parts marked by the his operation is generally reeated until a nice t is obtained and is a borious and 'exacting task.

It is an object of my inventlon to truel the crank pinbearing of a lconnecting rod by boring it;and the invention comprises a connecting rod holder-in combination with a boring tool and a centering device to adjustthe position of thebearing and boring tool.' One embodiment of the `invention is described in the specification andillustrated drawings wherein:

AFigure: 1 is a si e elevation of a boring tool',connec`ting rod clamp, and centering devices; Figure 2 is a front elevation of the Figure 3 is a reduced section through the clampin framel on line 3--3 of F-igure'l; Figure 4 1s a view of the middle'clamp detached and Figure 5 is, an lement, adjustable in imilar references characters corresponding parts throughout the. several Themachine comprises a frame having .adjustable clamping means designed to hol a connecting rod ofa small internal combustion engine one -or more for guiding a lboring bar,

ing rod with' respect to saidbearings in the frame, and a boring tool adapted to rotate in the clamp bearing..

' kelff or' division l opposite sides of Alockedby nuts 17., t l

Theboring bar is designated 20 and is ournalled in the' bearing ion orifices f4. At the right hand end as illustrated is Figure 2,l ahand crank 21 is se- I cured. Tebe crank 21 is slidable in a diametbearings therein. a means for centering the crank pm -bc'earing of the connect- 7, 1929. serialv no. v'359,385..

` at. one end, which may be called; the lower end, aligned cross bars 2, occupying the same plane as the bar'l, and bearing hangers 3 .projecting at right angles to the said plane fromvth'e ends Iof the bars 2, the bearing `hangers Shaving bearing.orifices-inaccurate- -ly sized to receive a boring bar designed-to enter them. Two clamping devices are `adjustably mounted on the bar 1. VOne of these clamping the wrist pin and wrist-pin end-or` the connecting rod, and the other is: adapted to clamp' the -si tween its ends.

The clamp for the wrist pin end comprises a body 5, which has a groove, rectangular in cross section, fitted to the rectangular 1 bar 1.- A cap plate 6 is secured by bolts 7 vto the body 5 boltsso as to clamp the barl firmly, or may- `be loosened so that the clamp may slide on said bar 1; The body 5' has a median lug 8, through .which is threaded a set bolt 9, which y locked by a nut 10. Opposed to the and may be tightenedby said maybe median lug 8 are two spaced lugs 11. In the sides of the lugs 11 that of the set tween the lugs 11; In use the wrist pin is bolt bears upon the end' of the rod.

The middle clamp is designated 13. It has a square opening fitted to the bar 1, a

of the opening, and a 4clamp bolt 14 serves to bind the clamp 13 in place upon the bar 1, or 4permitit to loosen so that it may be adjusted on saidfbarj.' Spaced lugs, 15 on said clamp lfare adapted to embrace .a connecting rod between them and 'set bolts 16 A95v in each lug maybe tightened to bear upon illustrated as' rical seat in the face of a split clamp' 22 secured to theend of the boring bar and may 1o5 be adjusted by the clamp screw 23 passing through he slot 24 in a usual manner. The

to receive va gage 28 having devices is adapted to'secure des of the connecting rod beface lug 8 are VV- shaped. notches .12.' The center' bolt 9,if extended, would pass midway beextending from the center the 'connectingrod and be `the other end otsaid sleeve; tering cone-32 1s freely movable over the sleeve andis reversed A in position as to cone 31.v A nut 33 threaded' on sleeve 30 is adapted to force the cones 31 and 32 toward each other. In practice the cones 31 and 32 enter the bearing of`a connecting rod from opposite ends and as they are forced together they bringthe bearingy into a position precisely concentric with the. bearing. orifices 4 in-bearing hangers 3, and with the boring bar 20 supported in said bearing orifices.

4In use the babbit or other bushings will be fitted to the connecting-rod.l Boring bar and centering devices are removed from position in the clamp frame. The small end 'of the connect-ing rod will be placed inthe end clamp, the .wrist pin restingin the V-grooves 12 and set bolt 9 in position to bear against the end of the connecting' rod. rI `he clamp 13 will be slid to mid position with bolts 16 opposite the sides of the rod, and the crank pin bearing will be brought roughly into registry with the bearings 4.' Sleeve 30,carrying centering cone 31, maY then be inserted through the connecting rod bearing. Cone 32 may be slid' over the other end of Sleeve 30 and nut 33 threaded on the sleeve. Boring bar 2() (with tool 25 removed) should then be passed through the' boring orifices v4, and sleeve 30. The cones 31'and132 should be brought toward each other to adjust the bearing orifice in the connecting rod concentric with the bearing orifices 4: andloor-n tightened; also side ,clamp screws 16, and

bolts '7 and 14 to fix the connecting rod.

securely in positiom-lined up true and ready to be bored. Boring bar 20 may then be pulled out, centering cones loosened, nut

. 33 and cone 32 taken ofi' and sleeve 30 rethe aid' of gage 28 or any moved. B'oring bar 20 may then be reinserted through bearing orifices 4 and will be concentric with the clamped in the frame. The test gage 28 may be seated, boring tool 25 adjusted by the bar rotated to bore out the bearing. The

gage 27 may be used to test the dimension of the bore both before and after boring. i

Having described my invention in the Vwork piece to the frame after the work ing bar 20. 'Then the set bolt 9 should ybe h crank pin bearing' suitable gage, andl form now best known to me, what I claim and desire to secure by Letters Patent is:

1. A boring appliance comprising a T- shaped frame consisting of a longitudinal bar united to a cross bar at one end, bearing hangers offset from said cross bar and provided with aligned bearing openings, two clampssleeved over said longitudinal bar and means for securing said clamps at different points along said bar, one of said clamps being constructed so as to receive the wrist-pin of a connecting rod and hold it parallel with the axis of said bearing openings, and the other being adapted to clampfthe sides .of the connecting rod between its ends, and V-shaped seats of the wrist-pin clamp opening away from the axis of the bearing openings.

2. A boring appliance comprising a frame bar, a guiding means for a boring bar offset from said frame bartand having an axis transverse thereof, a clamp on said frame bar comprising a pair Q fNspaced offset mem` -ing bar guidingl means, whereby a connect-v ing rod may be held to the frame with its crank pin vbearing in alignment with the boring bar guide.

3. In a boring machine, a frame having a guide bearing for a boring bar, a boring bar adapted to be journaled in said guide bearing, a sleeve adapted to fit over said boring bar, centering cones on said sleeve, means for forcing lthem toward each other and, means on said frame for securing a piece as been centered by the centering cones. 4. In a boring machine, a frame having a guide bearing for a boring bar, a boring bar adapted to be journaled in said guide bearing, a sleeve adapted to be removably fitted over said boring bar` a centering cone secured o one end of the sleeve, a centering cone adapted to be removably mounted on said sleeve, a removable device On said sleeve for forcing said cones toward each other and means on said frame for securing a workpiece to the frame after -the work piece has been centered by the centering cones.

In testimony whereof I aihx my signature.

ALISTER W. MARQUIS. 

